Bought the Svezda ISU-152. Canon barrel does not show much detail.
My question is: where does the main recoil movement show up at ?
Is it at the barrel junction in the middle of the barrel OR it is at the mantle.
The barrel junction is so lightly detailed that I am not even sure there is a junction gap there. May be it is a continuous barrel with no true recoil gap in its middle.

Hi Pierre

at the mantlet. This link may be of some help.

cheers
David

Thanks , David